EXERCISE: THÌ HIỆN TẠI HOÀN THÀNH
I. Điền “ since” hoặc “for” vào khoảng trống.
1. He watched television ………..three hours.
2. They have been friends………….five months.
3. My family has owned this farm……….1990.
4. I have wanted that book ………..months.
5. I haven’t seen you…………..Christmas.
6. We have been here………January.
7. I haven’t eaten any meat………….over a year.